From Essential Rubber Formulary: Formulas for Practitioners
17.1 Solid Rubber Soling for Footwear
| Ingredient | phr |
|---|---|
| 70.00 |
| 30.00 |
| 2.50 |
| 1.50 |
| 5.00 |
| 1.00 |
| 50.00 |
| 1.00 |
| 3.00 |
| 1.00 |
| 1.00 |
| Total | 166.00 |
| Note: | |
| Cure for 30 minutes at 150 C. | |
| Wallace plasticity = 45; Mooney scorch time (MS 1+3) at 120 C = 10 minutes; Tensile strength = 205 kg/cm2; Ultimate elongation = 500%; Modulus at 300% elongation = 70 kg/cm2; Shore hardness = 80 A. |
17.2 Black Heel for Footwear
| Ingredient | phr |
|---|---|
| 35.00 |
| 130.00 |
| 6.00 |
| 3.00 |
| 5.00 |
| 40.00 |
| 15.00 |
| 3.00 |
| 1.50 |
| 0.10 |
| Total | 238.60 |
| Note: | |
| Cure for 10 15 minutes at 153 C. | |
| Specific gravity = 1.30; Wallace plasticity = 35; Mooney scorch time (MS 1+3) at 120 C = 10 minutes; Tensile strength = 140 kg/cm2; Ultimate elongation = 450%; Modulus at 300% elongation = 68 kg/cm2; Shore hardness = 75 A. |
Alter the accelerator system as required to match processing conditions. Reclaimed rubber is added on the basis of rubber hydrocarbon at 50%.
17.3 Brown Soling for Footwear
| Ingredient | phr |
|---|---|
| 100.00 |
| 2.00 |
| 10.00 |
| 1.00 |
| 1.00 |
| 10.00 |
| 175.00 |
| 40.00 |
| 5.00 |
| 4.00 |
| 1.00 |
| 0.50 |
| Total | 349.50 |
| Note: | |
| Cure for 10 15 minutes at 153 C. | |
| Specific gravity = 1.40; |
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Topics of Interest
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